Latent office



Patented Aug. 3U, |898. J. W. KINCAID.

CHAIN HOIST.

(Application led ct. 27, 1897.)

2 Sheets-Sheet l.

(No Model.)

Inventor.

Witnesses.

Attorney.

u. PNoro-LTHO.. WASHINGTQN, D. c.

no. 9 m o 3 Uw u A l.a e t n e t a P u 9 s D. 1 M ...m s' mHw KNM .Inwmm .Cm J w.. M om 3 uw 9 0. 6 l N (No Modem Z Inventor. i' I Attorney.

JOSEPH w. KrNcAID, You READING,

PATENT EEicE.

PENNSYLVANIA, AsSIGNoE To THE Hole-r.V

SPECIFICATION forming part of Letters Patent No. 609,939, dated August3o, 1898.

Application filed october 27,1997." Serial No. 656,438. (Nomad.)

To all whom t may concern:

Be it knownV that I, JOSEPH W. KINcAID, a citizen of the United States,residing at Reading, in the county of Berks and State of Pennsylvania,have invented certain new and use- Iful Improvements in Chain Hoists, ofwhich the following is a specification.

This invention relates to hoisting machinery, and particularly to theclass of hoistingblocks or chain hoists employing a single chain to lifta load attached to the end of such chain direct from the lift-sheaveWithout passing said chain over a pulley-block and doubling the chain.

Theobject of the -invention is to provide asingle-chain.double-spur-gear hoist to raise andlower a heavy load orWeight quicker and with less exertion by the operator than hasheretofore been accomplished.

A further object of the invention is to provide a lift-sheave the hubofwhich has bearings in the two frame portions ofthe hoist and aninternal gear keyed to one of said hubs upon the outside of one of theframe portions. f

A further object of the invention is to provide a casing having a seriesof double spurgears j ournaled therein, a shaft having a pinion ononeend meshing with one set of the spurs, the other spur-set meshingwith an internal gear keyed to the lift-sheave upon the outside of oneof the frame portions, a clutch device, and means for connecting a hand-Wheel which is loosely mounted upon the hub of a friction-brake to thesaid shaft.

A still further obj ect of the invention is to provide a fixed frameportion having inter.

nal ratchet-teeth, a pawl-plate loosely mount-d ed upon the-hub` of thelift-sheave and carrying a paWl in engagement With said teeth, and afriction-disk held by and turned With the said paWl-plate. v A

The invention consists in the novelcon struction of parts, and resides,essentially, in an automatic brake or locking mechanism upon one end ofthe main shaft, a lift-sheave loosely mounted upon theshaft, a gearkeyed to the said sheave, and a'series of spur-gears certain of whichmesh with said sheave-gear `and others of which mesh with a pinion on 5othe Aother end of the said shaft.

In the accompanying drawings, Figure 1 is an elevation of my improvedhoist, looking at the end opposite the hand-chain wheel.` Fig.

2 is asection on the line X X, Eig. 1. Fig. 55 3 is aninterior plan viewof the frame por# tion having ratchet-teeth and carrying the hand-chainguides.. Fig. 4 is a similar view of the other frame portion.v Eig. 5 isa similar View of the casinggshowing the spur-gear 6o bracket securedthereto. Fig. 6 is an edge view of the gear-bracket. Fig; 7 is an edgeview of the pawl-plate with the pawl in place. Fig. 8 is a plan view ofthe friction-disk, showing it held by the paWl-plate. Eig'. 9 is 65 aplan view of one of the bracket-legs. Fig. 10 is a sectional View of oneof said legs on the line Y Y, Fig. 6. Fig. 11 is a plan View of thehand-Wheel hub. Fig. 12is an interior plan View of the clutch-nut. 7

The same numeral references denote the same parts throughout the severaliigures of the drawings.

The frame of the hoist is composed of two portions, one portion l beingdeeply concaved or recessed upon the outer face and having a centraljournal-bearing 2 and a raised bear ing-snrface 3. The other frameportion 1a has a journal-bearing 4, ratchet-teeth 5 upon k its outerface, lateral arms 6, to which are seA 8o cured handchain guides 6a, andlugs 7 through Which bolts 8 are passed into the frame portion 1 toconnect said lframe portions. The suspending-hook 9 is swiveled in ablock 10, the ends' of the latter being jour- 8 5 naled in ears 11 ofthe said two frame por= tions. A e

` The lift-sheave 12 Ais locatedin the interval or space i between theframe portions and loosely mounted upon the main shaft 13, and 9o itshubs 14 and 15 extend through' the journals 2 and l into the outer facesof the frame portions.

'The casing 16 is suitalolyfsecuredl `to the y frame portion 1 and has acentral bearing 17 95 for one end of the shaft 13, which has a longpinion 18 formed thereon. Upon the other end of` said shaft is aclutch-nut 19, held to the shaft by a lock-nut 20 and a Cotterpin 20a.

The spur-gear bracket 21 has a central bearing 2a, a series of legs 3,provided with countersunk ends 4 to receive set-bolts 5, passed throughthe casing 16, apertures in which a series of spindles 23 are screwedand keyed, and a central hub 22, against which one end of the pinion 18bears, the other end of said pinion having its bearing upon the innerface of the casing 1G. The said bracket is loosely mounted upon theshaft 13 adjacent the sheave-hub 14 in a cavity 21a of the internalsheave-gear 26.y

The series of spindles 23 project outwardly from the bracket 21 throughsockets 1b in the casing 16,and upon which spindles are loosely mountedfour spur-gears. These gears comprise small members 24 and 24a and largemembers 25 and 25, The small gears 24 are all in the same plane and meshwith the internal gear 26, keyed to the hub 14 of the sheave upon theoutside of the frame portion 1. The larger gears 25 are out of the planeof the like gears 25, and said gears 25 and 25a mesh with the pinion 18,which is of sufficient length to engage all the gears 25, whereby themotion of the shaft 13 is imparted to the sheave 12.

A disk 27, having a sleeve or hub 28, keyed to the shaft 13, whichsleeve or hub is provided with a reduced screw-threaded end 29, engagedby the clutch-nut 19. A frictiondisk 30, having peripheral notches 3l,is loosely mounted on the sleeve or hub 28. One face of saidfriction-disk engages the said disk 27, and the other face engages theinner face of the hand-wheel 36. A pawl-plate 32 is loosely mounted uponthe hub 15 of the sheave 12 and has fingers 33 to engage the notches 3lof the frictiondisk to prevent the latter from being independentlymoved. A pawl 34, carried by the pawl-plate and controlled by a spring35, keeps the pawl in engagement with the ratchet teeth 5. The wheel 36is loosely mounted on the disk sleeve or hub 18 and has an outerclutch-hub to engage the clutch-nut 19 and is provided with a suitablehand-chain 37.

A chain-divider 38 is secured between the frame portions by one of thebolts 8 to keep the lift-chain 39 divided or separated. A liftchainkeeper is secured between the frame portions and has a hook 41, which issupported by one of the bolts 8 and to which is connected one end of thelift-chain 39, the other end of said chain 'being provided with aswivel-hook 42, to which the load or weight is attached.

The driving mechanism consists of the liftsheave and its internal gear,the shaft and its pinion, the hand-chain wheel, the spur-gears, and thehub or sleeve of the disk 27 The brake mechanism comprises thefriction-disk, the ratchet-teeth, the pawl-plate, and its pawl.

The reversing and locking mechanism is composed of the clutch-nut, theclutch-hub of the hand-wheel, and the disk 27.

The operation of the hoist is as follows: In raising a load or weightthe hand-wheel is turned to the right by a pull on the handohain, whichturns the hub of the hand-wheel upon the highest part of the clutch-nut,forcing the wheel away from said nut and causing it to make a frictionalclutch with the friction-disk and the latter with the disk 27, thuslocking all of said parts together. Then by a continued pull on thehand-chain in the same direction the said parts, the pawl-plate, and theshaft 13 are all turned in a body, with the pawl sliding over theratchet-teeth, and the sheave is turned in the opposite direction to thehand-wheel by the shaft-pinion meshing with the large spur-gears and thesmall gears meshing with the, internal sheave-gear.

To lower a load, (the pull on the hand-wheel being stopped,) the loadwill reverse the move` ment of the above-mentioned revoluble parts, andby turning the hand-wheel to the left all of said parts except thefriction-disk and pawlplate are rotated together, leaving thefriction-disk idle and the pawl-plate locked to the fixed frame by thepawl engaging the ratchet-teeth of the said frame. The spurgears, thepinion, and the internal sheavegear are simply turned in the oppositedirection from that in hoisting a load. A load is suspended in loweringby stopping the pull on the hand-wheel. VVhereupon the weight of theload will turn the sleeve-disk to force the friction-disk against theface of the handwheel, which makes a friction-brake between thefriction-disk, sleeve-disk,and hand-wheel, said elements being held inthis position by the pawl-and-ratchet device until the handwheel isturned to either hoist or lower the load, as hereinbefore described.

It will be observed that the hoist is always self locked or checkedagainst backward motion or dropping the load during both operations, andthat the friction-disk is at all times locked with or held by thepawl-plate and cannot be turned independently, and the sleeved disk,being keyed to the shaft, is turned independent of the friction-disk andof the pawl-plate in lowering; but in hoisting all of said parts arelocked and turned together.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A pulley block or hoist comprising a fricn tion-disk, and a revolublepawl-plate carrying a pawl and holding the disk against independentmovement, as set forth.

2. A pulley block or hoist comprising a fixed frame having teeth, aloosely-mounted revoluble pawl-plate, and a pawl on the plate to engagesaid teeth, as set forth.

3. A pulley block or hoist comprising a frame having teeth, a revolubleplate, a pawl on the plate to engage said teeth, a friction- IOO IIO

y ing, as set forth. t

6. A fixed hoist-frame having ratchet-teeth formed therein, alift-sheave j ournaled in the frame, a driving-shaft, a sleeved diskkeyed to the drivin g-shaft, a revoluble plate loosely mounted on thehub of the sheave, and a Apawl engaging said teeth.

7. A iixed hoist-frame having ratchet-teeth formed therein,| alift-sheave j ournaled in the frame, a revoluble paWl-plate looselymounted on one hub of the sheave, a pawl engaging said teeth, and aninternal gear secured to the other hub of the said sheave.

8. The combination,with ahoist-frame composed of two parts suitablyjoined together with a space between them, one part having internalratchet-teeth,and the other part having a recessed outer face, of alift-sheave journaled in and between the frame portions, an internalgear secured to one hub of the sheave in said recess, a revolublepawl-plate loosely mounted on the other sheave-hub,and aspring-controlled pawl carried by said plate, as set forth.

9. The combination of a driving mechanism comprising a shaft, ahand-wheel connected to one end of the shaft, a pinion on the other endof the shaft, an internal gear keyed to the hoist-sheave, and thespur-gears composed of integral large and small members, two ofthe largemembers being out of the plane of the other two and all .meshing withthe pinion, and the small members all being in the same plane andmeshing with the internal gear, as set forth.-

lO. The combination of the spur-gears, the bracket, the internal gear,the sheave, the gear-spindles having one end secured t0 the bracket, thefixed casing having the bracket secured thereto and carrying the otherend of the spindles, and means for driving the j gears to operate thesheave, as set forth.

' 1l. The combination, with the frame,` the lift-sheave, the shaft, theshaft-pinion, and the casing secured to the frame, of the bracket havinglegs attached to the casing, the spurgears, the spur-gear spindles fixedVto the bracket and projecting into the casing, and means for operatingthe said shaft,as set forth.

12. The combination of the bracket,` the spur-gears carried by theVbracket and composed of large and small members, a drivingshaft, ahoist-sheave, a gear on the sheave, a pinion on the shaft of sufficientlength to engage the large members, two of which are out of the plane ofthe other two, the small members all being in the same plane and meshingwith the sheave-gear, and means for operating the shaft, as set forth.

13. The combination, with the shaft, and means for driving it, of theframe, the liftsheave having the shaft extending through it andjournaled in the frame, a gear keyed to the sheave, a pinion on theshaft adjacent the said gear, a casing secured to the frame, a bracketheld by the casing, and the spurgears each composed of two memberscarried by the bracket,one member meshing with said pinion and the othermember meshing with said sheave-gear, as set forth.

14. The combination, with the frame composed of two portions suitablyjoined together with an interval or space between them, one

of said `portions having internal ratchet-teeth

